Jasper County Power Outage History
2014–2025 · Iowa
Bottom 20% least reliable nationally — frequent and/or long outages. How grades are calculated
Outages by year
Outages by month (seasonality)
Worst outage events on record
| Date | Duration | Customers affected | Cause |
|---|---|---|---|
| Aug 10, 2020 | 212 hrs | 14,954 (79%) | Thunderstorm Wind |
| May 21, 2024 | 17 hrs | 7,059 (37%) | Drought |
| Dec 16, 2021 | 53 hrs | 6,920 (37%) | High Wind |
| May 24, 2024 | 32 hrs | 4,736 (25%) | Drought |
| Jun 15, 2016 | 0 hrs | 4,494 (24%) | Unnamed event |
Over the 12 years from 2014 to 2025, Jasper County recorded 421 distinct power outage events, averaging 3.0 hours per event.
The single worst outage on record in Jasper County started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and leaving up to 14,954 customers without power (79% of the county) at its peak.
July has historically been the worst month for outages in Jasper County, with 59 events recorded during that month across the dataset.
Based on this history, Jasper County earns a Reliability Grade of F, placing it in the 14th percentile nationally for grid reliability (higher percentile = more reliable).
Sized for Jasper County's outage profile
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Similar counties in Iowa
Counties with the closest reliability grade and national percentile to Jasper County.
| County | Grade | National percentile |
|---|---|---|
| Poweshiek County | F | 15th |
| Linn County | F | 16th |
| Tama County | F | 12th |
| Benton County | F | 18th |
| Greene County | D | 20th |
FAQ
How often does power go out in Jasper County?
Between 2014 and 2025, Jasper County recorded 421 outage events, averaging 3.0 hours each.
What is Jasper County's reliability grade?
Jasper County has a Reliability Grade of F, in the 14th national percentile.
What was the worst power outage in Jasper County?
The worst outage on record started August 10, 2020 (Thunderstorm Wind), lasting 212 hours and affecting up to 14,954 customers.